BLA31BD102SN4D Filters

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Ferrite beads and chips are electronic components used to block high-frequency noise current and to suppress high-frequency noise. The BLA31BD102SN4D is a ferrite bead and chip used to suppress EMI (electromagnetic interference) in low-voltage DC applications.

The BLA31BD102SN4D is a low-current ferrite bead with a resistance of 1.1 Ohms max @ +25°C and a working temperature range of -40°C to +125°C. The bead has two terminals, each with a contact resistance of 0.4 Ohms max. The bead is also designed with a very low resistance in the DC range, typically below 0.2 Ohms between the terminals.

The BLA31BD102SN4D can be used in many applications, such as power supplies and motor drives. It is particularly useful in the automotive, medical, and industrial fields for suppressing EMI noise generated by switching electronics. It is typically used as a low-cost, low-power-consumption solution for EMI suppression.

The working principle of the BLA31BD102SN4D ferrite bead and chip is relatively simple. A common-mode choke, as it is known, works by forming a low-pass filter that reduces the voltage spikes or noise caused by EMI. It works by diverting the electric currents that produce the interference, thus avoiding a direct coupling of the noise currents. The common-mode choke also filters the “low-frequency” noise caused by ground loops.

The BLA31BD102SN4D ferrite bead and chip is a practical, low-cost and efficient solution for EMI suppression. It is easy to integrate into existing solutions and requires minimal space. It is also very durable and can be used over a wide temperature range, making it a great choice for applications in the automotive, medical, and industrial sectors.

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